The most commonly used optical-trapping assays are coupled to surfaces, yet such assays lack atomic-scale ( approximately 0.1 nm) spatial resolution due to drift between the surface and trap. We used… (More)

The Escherichia coli Min system self-organizes into a cell-pole to cell-pole oscillator on the membrane to prevent divisions at the cell poles. Reconstituting the Min system on a lipid bilayer has… (More)

Magnetic tweezers provide a versatile tool enabling the application of force and torque on individual biomolecules. Magnetic tweezers are uniquely suited to the study of DNA topology and protein-DNA… (More)

We report on the experimental observation of the phase angle of a particle escaping over a periodically modulated potential barrier. Optical tweezers and back-focal plane position detection were used… (More)